feat: add username/password login, account settings, and changelog (#133) (#134)

- Add username/password login as additional auth mechanism alongside existing token
- First login must use token; password can be configured in Settings > Account
- Password login returns the existing static token (no auth middleware changes)
- Add account settings: setup, change password, change username, remove password
- Add logout button to sidebar footer
- Add version changelog popup (click version number in sidebar)
- Support all 8 locales (en, zh, de, es, fr, ja, ko, pt)
- Bump version to 0.4.3

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/i18n/locales/zh.ts

@@ -8,6 +8,32 @@ export default {
     tokenRequired: '请输入访问令牌',
     invalidToken: '令牌无效',
     connectionFailed: '无法连接到服务器',
+    passwordLogin: '密码登录',
+    tokenLogin: '令牌登录',
+    usernamePlaceholder: '用户名',
+    passwordPlaceholder: '密码',
+    credentialsRequired: '请输入用户名和密码',
+    invalidCredentials: '用户名或密码错误',
+    passwordMismatch: '两次密码不一致',
+    passwordTooShort: '密码长度至少 6 个字符',
+    setupSuccess: '密码登录配置成功',
+    passwordChanged: '密码修改成功',
+    passwordRemoved: '密码登录已移除',
+    setupPassword: '设置密码登录',
+    changePassword: '修改密码',
+    changeUsername: '修改用户名',
+    removePasswordLogin: '移除',
+    username: '用户名',
+    currentPassword: '当前密码',
+    newPassword: '新密码',
+    confirmPassword: '确认密码',
+    newUsername: '新用户名',
+    usernameChanged: '用户名修改成功',
+    usernameTooShort: '用户名至少 2 个字符',
+    setupDescription: '设置用户名和密码以便快速登录。访问令牌仍可继续使用。',
+    removeConfirm: '确定要移除密码登录吗？移除后需要使用访问令牌登录。',
+    passwordLoginNotConfigured: '密码登录未配置',
+    passwordLoginConfigured: '密码登录已启用（{username}）',
   },
 
   // 通用
@@ -69,6 +95,9 @@ export default {
     updating: '正在更新...',
     updateSuccess: '更新完成，请重启服务',
     updateFailed: '更新失败',
+    logout: '退出登录',
+    changelog: '更新日志',
+    noChangelog: '暂无更新日志',
   },
 
   // 对话
@@ -316,6 +345,7 @@ export default {
     saveFailed: '保存失败',
     tabs: {
       display: '显示',
+      account: '账户',
       agent: '代理',
       memory: '记忆',
       session: '会话',
@@ -513,4 +543,18 @@ export default {
     cost: '费用',
     noData: '暂无用量数据',
   },
+
+  // 更新日志
+  changelog: {
+    new_0_4_3_1: '新增用户名/密码登录，支持与令牌认证并存',
+    new_0_4_3_2: '新增账户设置：配置密码、修改密码、修改用户名',
+    new_0_4_3_3: '侧边栏新增退出登录按钮',
+    new_0_4_3_4: '点击版本号查看更新日志弹窗',
+    new_0_4_2_1: '新增 Token 用量追踪、上下文显示和动态上下文长度',
+    new_0_4_2_2: '新增会话搜索弹窗',
+    new_0_4_2_3: '恢复群聊系统（Socket.IO + SQLite 持久化）',
+    new_0_4_2_4: 'Chat 页面新增固定会话和实时监控',
+    new_0_4_2_5: '修复内置 Provider 检测和模型匹配问题',
+    new_0_4_1_1: '修复认证绕过、SPA 静态文件服务和 Provider 改进',
+  },
 }